Furuno's 80-plus year heritage in marine, broadcast, and timing electronics is the foundation of one of the most advanced GNSS receiver and disciplined oscillator portfolios in the world. The range is recognised for industry-leading timing stability better than 4.5 nanoseconds 1σ for single-band receivers , with dual-band L1/L5 capability available for the highest-robustness applications. To complete the signal chain at the front end, pair these modules with the Furuno GPS/GNSS antenna range.
Atomic-clock-class disciplined oscillators with up to 24-hour holdover deliver continuous timing accuracy even during satellite signal outages. Compact, low-power form factors make the entire range suited to . The breadth of the product line covers pure receiver modules through to full GNSSDOs, so you can specify the right product without over-investing or compromising on accuracy.
Furuno modules are trusted by 5G operators, broadcasters, defence primes, and critical infrastructure operators worldwide. For RF-system context on radar and SATCOM applications, see our Frequency Synthesizer Guide for Radar and Satcom.
Achieves the world's highest robustness and stability by receiving dual-band L1/L5. The GT-100 is Furuno's flagship timing receiver, delivering premium accuracy for the most demanding synchronisation applications.
World's highest stability with less than 4.5 nanoseconds (1σ) under open sky in an L1 single-band receiver.
Extremely high stability of 4.5 ns (1σ) using a single-band receiver in the most compact embedded-ready form factor.
Concurrent multi-GNSS receiver supporting GPS plus GLONASS, optimised for industrial positioning applications.
Ultra-small GNSSDO with atomic-clock-level frequency stability and 24-hour holdover.
Atomic-clock-class GNSSDO with 24-hour holdover comparable to rubidium-grade oscillators.
GPS-disciplined rubidium oscillator engineered for digital terrestrial broadcasting.
Palm-sized portable atomic clock with 1PPS and 10 MHz reference outputs.
| Model | Type | Bands | Stability | Holdover | Best Use Case |
|---|---|---|---|---|---|
| GT-100 | Timing receiver | L1/L5 dual-band | Premium | N/A | 5G dual-band timing |
| GT-90 / GT-9001 | Timing receiver | L1 single-band | <4.5 ns (1σ) | N/A | Cost-sensitive timing |
| GT-88 | Timing receiver | L1 single-band | 4.5 ns (1σ) | N/A | Embedded timing |
| GN-87 | Positioning receiver | L1 | Standard | N/A | GPS + GLONASS positioning |
| GF-8801/02/03 | GNSSDO | Multi-GNSS | Atomic-class | 24 hours | Telecom and grid timing |
| GF-8804/05 | GNSSDO | Multi-GNSS | Rubidium-class | 24 hours | Critical timing |
| GF-8048 | GPS DO (Rb) | GPS L1 | Rubidium | Extended | DTT broadcasting |
| TB-1 | Portable sync generator | GNSS | Atomic-class | N/A | Field reference |
A GNSS receiver module extracts timing and positioning information directly from satellite signals, providing precise output when satellites are visible but stopping when signal is lost. A GNSS-disciplined oscillator (GNSSDO) combines a precision oscillator (such as OCXO or rubidium) with a GNSS receiver to deliver continuous timing even during satellite signal outages, known as holdover. Choose a receiver module when GNSS lock is reliable; choose a GNSSDO when uninterrupted accurate timing is mission-critical.
Both the Furuno GT-90 and GT-88 modules achieve less than 4.5 nanoseconds (1σ) timing stability under open-sky conditions using single-band L1 reception. This represents one of the highest single-band timing stabilities available in the industry. The GT-90 includes additional variants such as the GT-9001 for specific integration requirements, while the GT-88 is optimised for the most compact embedded designs.
The Furuno GT-100 is a dual-band L1/L5 timing module that delivers the world's highest robustness and stability for premium timing applications including 5G base station synchronisation and financial networks. The GT-90 is a single-band L1 timing module that still achieves world-class stability (less than 4.5 ns 1σ) at a more cost-effective price point. Choose GT-100 when dual-band signal redundancy is critical; choose GT-90 for high-accuracy timing in cost-sensitive deployments.
A GNSS-disciplined oscillator (GNSSDO) is used in any application requiring continuous, highly accurate timing even when GNSS signals are interrupted. Common applications include 5G mobile network timing, broadcast synchronisation, smart grid Phasor Measurement Units (PMUs), data centre Precision Time Protocol (PTP) networks, financial trading timestamp compliance, and defence communications. GNSSDOs are essential where satellite signal loss would otherwise cause timing degradation that disrupts the entire network.
Holdover refers to the period during which a disciplined oscillator can maintain accurate timing after GNSS signal loss. A 24-hour holdover, as found in the Furuno GF-8801, GF-8804, and GF-8805 series, means the oscillator can continue providing high-accuracy timing for up to 24 hours without satellite reception. This is critical for mission-critical applications where extended satellite outages (jamming, dense urban canyons, weather interference) must not disrupt timing-dependent operations.
Yes. Emerges is an authorised Furuno distributor in Singapore and Southeast Asia. We supply the complete Furuno GPS/GNSS module range, antennas, and chips. Emerges holds AS9120B and ISO 9001 certifications and serves customers across Singapore, Malaysia, Vietnam, Thailand, and the wider Asia-Pacific region.
Standard Furuno module variants are typically available from Emerges Singapore stock with lead times of 2 to 4 weeks for unstocked models from Furuno's factory. For urgent requirements or large-volume orders, contact our sales engineering team directly for current stock availability and expedited delivery options across Asia-Pacific. Lead times for the more specialised GNSSDO variants (GF-8804, GF-8805) and the GF-8048 broadcasting oscillator may be slightly longer due to lower stocking levels.
GNSSDO stands for GNSS-Disciplined Oscillator. It refers to a device that combines a precision oscillator (such as OCXO or rubidium) with a GNSS receiver, where the GNSS signal continuously trains (disciplines) the oscillator to maintain long-term accuracy. You need a GNSSDO when continuous timing must be maintained even during satellite signal outages, such as in 5G base stations, broadcast networks, power grids, data centres, and financial timing applications. If your application can tolerate timing gaps during outages, a simpler GNSS receiver module is sufficient.
Yes, the Furuno TB-1 is specifically designed as a portable atomic-class time and frequency reference. It provides 1PPS (one pulse per second) and 10 MHz reference outputs in a palm-sized form factor with fast acquisition. The TB-1 is ideal for field calibration of timing equipment, mobile broadcast units, defence field communications, RF test bench reference, temporary installations, and any application requiring instant atomic-class reference without permanent infrastructure.
